I need as many opinions as possible!

If your dad, half of your genes, just left you fro 3 1/2 years; what would you do.

He was an achoholic, druggie, put himself before me. And then eventually just stopped seeing me. This all happened over 3 1/2 years ago.

Recently he contacted my mom, and he wants to talk to me and my brother. But I don't know if I want to talk to him. My brother decided to talk to him, but I have yet to make a decision, and I need help.

So, should I talk to him? Yes or No.
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Please comment. it can be long, detailed. Or just yes, i should talk to him. No, i shouldn't.